Log Car
This is one of the simpler cars to build. The problem here is the weight. There is no
place to add enough weight that can be concealed. I made a pocket in the center
beam and added tungsten powder.
More weight is needed to make this car run reliably. I might need to add some hard
wood as lumber load. I'll also try to make a molded lead as weight in the pocket
instead of Tungsten powder because solid lead is heavier in the same volume than
powdered Tungsten.